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Title: | Climatic factors related to low rice (Oryza sativa L.) yield in the wet season under double cropping in the Mekong Delta, Vietnam |
Authors: | Kondo, Motohiko Lizumi, Yoshiko Yvatanabe, Takeshi Luu, Hong Man Nguyen, Kim Thu Vu, Ngoc Minh Tam Ho, Nguyen Hoang Phuc Nguyen, Thi Ngọc Han Duong, Hoang Son Nguyen, Huu Chiem |
Keywords: | Radiation Damage Temperature |
Issue Date: | 2021 |
Series/Report no.: | Japan Agricultural Research Quarterly;Vol. 55, No. 03 .- P.217-224 |
Abstract: | This study aimed to determine the rice (Oryza sativa L.) yield under douhle cropping in the Mekong Delta, Vietnam, and idenlify which climatic lactors cause a reduced yield in the wet season (WS) compared with the dry season (DS). A series of field experiments was conducted in the field from 2014 to 2017, along with a supplementary pot experiment, by using the rice variety OM 6976. The yield was 38% lower in WS than in DS, mainly due to a decrease in the spikelet number per panicle and percentage of ripening. This yield reduction observed in WS was most closely related to lower radiation at 51-80 days after transplanting, and was also related to higher temperature. These results suggest that low radiation and high temperature during the reproductive to grain-filling stages were mainly responsible for causing a lowyield in WS. In addition. a need to further consider soil reduction was suggested based on more extensive root damage and sulfide levels on roots observed in WS as compared with DS. |
URI: | https://dspace.ctu.edu.vn/jspui/handle/123456789/73295 |
ISSN: | 0021-3551 |
Appears in Collections: | Japan Agricultural research quarterly |
Files in This Item:
File | Description | Size | Format | |
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_file_ Restricted Access | 1.68 MB | Adobe PDF | ||
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